I using ubontu 20.04. My team membe create a laravel project on Windows 10. I tring to clone this project from GitHub. after cloning repository. When I run composer update I got error. PHP Fatal error: Uncaught ReflectionException: Class App\Console\Kernel does not exist. Not only that I also run this command php artisan --version unfortunately. I got same error again.
I tring many to ways to selve this problem such as:

Way-1 In composer.json change:

"psr-4": {
        "App\\": "myforms/app/"
    } 

to:

"psr-4": {
        "App\\": "app/"
    }

On the server, in my source directory, run composer update then composer dump-autoload

Result:- My composer.json "App\": "app/"

Way-2 Check if console/kernel.php is inside of app-folder, if not it might be inside of my laravelApp.

If so, move console/kernel.php to app-folder.

Result:- Yes App/Console/Kernel.php is exist

Way-3 In my case composer.json was missing propper bracket closing "{ }" and line with "psr-4" was in wrong json segment.

1. Check composer.json for proper align of "psr-4" it should be child of "autoload" section.
2. Remove vendor
3. composer install

Result:- I did but error was same

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